Why Is Food Irradiated

Name ______Period _____

Uses of Radioisotopes

Medical diagnostics

Read Uses of Radiation which starts on pg 828 in your book & visit http://healthguide.howstuffworks.com/bone-scan-dictionary.htm .

1) Explain 2 ways radiotracers are used in medical diagnostics.

Cancer Treatment

Visit http://healthguide.howstuffworks.com/brain-tumors-primary-in-depth9.htm & answer the questions below.

2) Why is radiotherapy used after surgical removal of tumors?

3) How is conventional radiotherapy different from stereotactic radiosurgery?

4) What is the purpose of the drugs that are sometimes administered with the radiation?

Irradiation

Go to http://streaming.discoveryeducation.com/search/assetDetail.cfm?guidAssetID=30642648-C05B-41A4-99F2-561DA3365A5F. userid is sayreschool, password is library

Click on video segments.

View the 3rd segment: Irradiation of Food & answer the questions below.

5) Why is food irradiated?

6) What isotope is used to irradiate food?

7) Briefly describe the plant that irradiates the food.

8) Why does irradiated food require a symbol to indicate that it has been treated?

9) What is the concern regarding irradiated food?

10) Is there evidence to support this concern?

11) Why are some people opposed to irradiating food?

12) Besides food what else do we irradiate to kill germs?

14) How are radioisotopes used in other industries?